42032031665 has 8 divisors (see below), whose sum is σ = 54318317928. Its totient is φ = 31039038720.

The previous prime is 42032031661. The next prime is 42032031673. The reversal of 42032031665 is 56613023024.

It can be written as a sum of positive squares in 4 ways, for example, as 6486208369 + 35545823296 = 80537^2 + 188536^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42032031665 - 2² = 42032031661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42032031661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323323256 + ... + 323323385.

It is an arithmetic number, because the mean of its divisors is an integer number (6789789741).

Almost surely, 2^42032031665 is an apocalyptic number.

It is an amenable number.

42032031665 is a deficient number, since it is larger than the sum of its proper divisors (12286286263).

42032031665 is a wasteful number, since it uses less digits than its factorization.

42032031665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646646659.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 42032031665 its reverse (56613023024), we get a palindrome (98645054689).

The spelling of 42032031665 in words is "forty-two billion, thirty-two million, thirty-one thousand, six hundred sixty-five".